Haproxy/Keepalived Server1: 192.168.1.253
Haproxy/Keepalived Server2: 192.168.1.254
Haproxy/Keepalived VIP: 192.168.1.250

Haproxy/Keepalived Server1:

1. echo "net.ipv4.ip_nonlocal_bind = 1" >> /etc/sysctl.conf
sysctl -p

yum -y install keepalived haproxy

2. cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.bak
vi /etc/keepalived/keepalived.conf
global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id centos65-2
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.250
    }
}
下面的都删除

1). Priority value will be higher on Master server
2). virtual_router_id should be same on both servers
3). By default single vrrp_instance support up to 20 virtual_ipaddress

3. service keepalived start; chkconfig keepalived on
ip addr show eth0

4. vi /etc/haproxy/haproxy.cfg
注释原有的frontend和backend
frontend web 192.168.1.250:8080
        default_backend web

listen stats 192.168.1.253:8080
        mode http
        stats enable
        stats uri /

backend web
        balance leastconn
        server web01 192.168.1.253:80 check
        server web02 192.168.1.254:80 check

service haproxy start; chkconfig haproxy on

Haproxy/Keepalived Server2:

1. echo "net.ipv4.ip_nonlocal_bind = 1" >> /etc/sysctl.conf
sysctl -p

yum -y install keepalived haproxy

2. cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.bak
vi /etc/keepalived/keepalived.conf
global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id centos65
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.250
    }
}
下面的都删除

3. service keepalived start; chkconfig keepalived on
ip addr show eth0

4. vi /etc/haproxy/haproxy.cfg
注释原有的frontend和backend
frontend web 192.168.1.250:8080
        default_backend web

listen stats 192.168.1.254:8080
        mode http
        stats enable
        stats uri /

backend web
        balance leastconn
        server web01 192.168.1.253:80 check
        server web02 192.168.1.254:80 check

service haproxy start; chkconfig haproxy on

本文出自 “Ilovecat(个人笔记)” 博客，请务必保留此出处http://hj192837.blog.51cto.com/655995/1546076

Install Haproxy Keppalived on CentOS 6.5